* Structure: Wood is primarily made of cellulose, a complex carbohydrate. The electrons in these molecules are tightly bound and not free to move easily.

* Resistance: This means wood offers high resistance to the flow of electric current. Electricity struggles to pass through it.

* Practical Applications: This is why wood is used in electrical applications like power poles and electrical housing. It prevents the flow of electricity to the surrounding environment.

However, there are exceptions:

* Moisture: Wet wood can become more conductive. Water contains ions, which can carry electric current.

* Type of Wood: Some woods like pine and oak are naturally more resistant than others.

* Voltage: Under extremely high voltages, even dry wood can be overcome, allowing some current flow.

In general, think of wood as a good insulator, but always be cautious when dealing with electricity, as the presence of moisture or extremely high voltages can alter its insulating properties.